#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <sched.h>
#include "Mutex.hpp"

using namespace LockModule;

int ticket = 0;
Mutex mtx;
pthread_mutex_t mutex;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

void *route(void *arg)
{
    char *id = (char*)arg;
    while (1)
    {
        // mtx.Lock();
        // if (ticket > 0){
        //     usleep(1000);
        //     printf("%s sells ticket:%d\n", id, ticket);
        //     ticket--;
        //     mtx.Unlock();
           
        // }
        // else{
        //     mtx.Unlock();
        //     break;
        // }
        


        // 构建临时对象 以代码块的形式
        {
            LockGuard lockguard(mtx); // 临时对象，临界区
            if (ticket > 0){
                usleep(1000);
                printf("%s sells ticket:%d\n", id, ticket);
                ticket--;
            }
            else{
                break;
            }
        }

        // pthread_mutex_lock(&mutex);
        // if (ticket > 0)
        // {
        //     usleep(1000);
        //     printf("%s sells ticket:%d\n", id, ticket);
        //     ticket--;
        //     pthread_mutex_unlock(&mutex);
        // }
        // else
        // {
        //     printf("%s wait on cond!\n", id);
        //     pthread_cond_wait(&cond, &mutex); //醒来的时候，会重新申请锁！！
        //     printf("%s 被叫醒了\n", id);
        // }
        // pthread_mutex_unlock(&mutex);
    }
    return nullptr;
}

int main()
{  
    pthread_t t1, t2, t3, t4;
    pthread_mutex_init(&mutex, NULL);

    pthread_create(&t1, NULL, route, (void*)"thread-1");
    pthread_create(&t2, NULL, route, (void*)"thread-2");
    pthread_create(&t3, NULL, route, (void*)"thread-3");
    pthread_create(&t4, NULL, route, (void*)"thread-4");

    int cnt = 10;
    while(true)
    {
        sleep(1);
        ticket += cnt;
        printf("主线程放票, ticket: %d\n", ticket);
        pthread_cond_signal(&cond);
    }

    pthread_join(t1, NULL);
    pthread_join(t2, NULL);
    pthread_join(t3, NULL);
    pthread_join(t4, NULL);

    pthread_mutex_destroy(&mutex);

    return 0;
}